import { Injectable } from '@angular/core';
import { PreloadingStrategy, Route } from '@angular/router';
import { Observable, of } from 'rxjs';
@Injectable()
export class PreloadService implements PreloadingStrategy{

    preload(route: Route, load: Function): Observable<any> {
        return route.data && route.data.preload ? load() : of(null);
    }

}
